How to use the len() function to get the length of a string in Python 3.x

How to use the len() function to get the length of a string in Python 3.x

In Python, the len() function is a very commonly used function for getting the length of a string. This article will introduce how to use the len() function to get the length of a string in Python 3.x version, and provide some sample code.

The len() function is a built-in function in Python, which is used to return the length of an object or the number of elements. In the case of a string, the len() function will return the number of characters in the string.

The following is a simple sample code that shows how to use the len() function to get the length of a string:

str = "Hello, World!"
length = len(str)
print("字符串的长度为：", length)

Run the above code, the output will be:

字符串的长度为： 13

In the above example, we defined a string variable str with the content "Hello, World!". Then we use the len() function to get the length of the string and assign the result to the variable length. Finally, we use the print() function to print out the length of the string.

In addition to strings, the len() function can also be used for other objects. For example, we can use it to get the number of elements in container objects such as lists, tuples, and dictionaries. Here is a sample code that shows how to use the len() function to get the length of a list:

list = [1, 2, 3, 4, 5]
length = len(list)
print("列表的长度为：", length)

Run the above code, the output will be:

列表的长度为： 5

In the above example, we define A list variable list is created, containing 5 elements. Then we use the len() function to get the length of the list and assign the result to the variable length. Finally, we use the print() function to print out the length of the list.

To summarize, the len() function is one of the most practical functions in Python and can be used to obtain the length of strings and other container objects. When writing a program, if you need to obtain the length of a string or the number of elements of other objects, you can use the len() function to achieve this. I hope this article can help you use the len() function to get the length of a string in Python.

The above is the detailed content of How to use the len() function to get the length of a string in Python 3.x. For more information, please follow other related articles on the PHP Chinese website!